SFB basis applied to eBOSS DR16 samples identifies evidence (p<0.005 vs EZMocks) of stellar contamination systematics at large scales in QSOs and unknown systematics at plate/imaging scales in both LRG and QSO samples via fNL inconsistencies.
Such radial inhomogeneities, on the largest scales, could arise from , e.g., systematics or FoG model misspecification
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Demonstrating the Use of the Spherical Fourier Bessel Basis for Large Scale Clustering Systematics Discovery and Mitigation with eBOSS
SFB basis applied to eBOSS DR16 samples identifies evidence (p<0.005 vs EZMocks) of stellar contamination systematics at large scales in QSOs and unknown systematics at plate/imaging scales in both LRG and QSO samples via fNL inconsistencies.